Hyun Jun and Sun Hwa follow the IRIS assassin back to his home. They're unable to get any info out of him before Hyun Jun kills him.
Hyun Jun and NSS discover the hideout of Baek San and IRIS. Baek San is taken into custody.
Sa Woo meets with Mr. Black. Sa Woo takes over for Baek San.
Hyun Jun has dinner with Seung Hee. Seung Hee explains that she disappeared because she met with Baek San and Mr. Black. That her family owed a lot to Baek San and she was asked to return the favor by working for IRIS. She declined the offer.
Sa Woo and IRIS go into a department store and take everyone there hostage.